Grabbing values from Hash ruby -

bit lost on one. grabbing table data http://www.bbc.co.uk/sport/football/tables using nokogiri. sort unsure how grab of data wanted, kindly provided example of looks so

require 'open-uri' require 'nokogiri'  url = 'http://www.bbc.co.uk/sport/football/tables' doc = nokogiri::html.parse(open url) teams = doc.search('tbody tr.team')  keys = teams.first.search('td').map |k|   k['class'].gsub('-', '_').to_sym end  hsh = teams.flat_map |team|   hash[keys.zip(team.search('td').map(&:text))] end  puts hsh 

im little unclear of this, can see final output hsh gives hash example

{:statistics=>"", :position=>"no movement 20", :team_name=>"reading", :played=>"33", :home_won=>"4", :home_drawn=>"7", :home_lost=>"6", :home_for=>"23", :home_against=>"31", :away_won=>"1", :away_drawn=>"2", :away_lost=>"13", :away_for=>"13", :away_against=>"32", :goal_difference=>"-27", :points=>"24", :last_10_games=>"\n                                    draw\nwin\nloss\nloss\nloss\nloss\nloss\nloss\nloss\ndraw", :status=>"\n                    report of reading's last match                "}  {:statistics=>"", :position=>"no movement 19", :team_name=>"qpr", :played=>"33", :home_won=>"2", :home_drawn=>"8", :home_lost=>"6", :home_for=>"12", :home_against=>"23", :away_won=>"2", :away_drawn=>"4", :away_lost=>"11", :away_for=>"17", :away_against=>"31", :goal_difference=>"-25", :points=>"24", :last_10_games=>"\n                                    draw\ndraw\nloss\nloss\nwin\nwin\nloss\nloss\ndraw\nloss", :status=>"\n                    report of qpr's last match                "} 

so thinking grab each :team_name go through loop would

hsh.each |k,v]   v['team_name'] end 

so give me value of team_name every hash? im trying achieve @ extracting elements nokogiri make sense of provided solution , save each value model

could clarify understanding please

thanks

this doesn't useful, iterates on hsh doesn't because value want in k:

 hsh.each |k,v]   v['team_name'] end 

the problem thathsh array of hashes. keeping same name, hsh, treating array:

hsh.map{ |a| a[:team_name]} 

returns:

 [     [ 0] "man utd",     [ 1] "man city",     [ 2] "chelsea",     [ 3] "arsenal",     [ 4] "tottenham",     [ 5] "everton",     [ 6] "liverpool",     [ 7] "west brom",     [ 8] "swansea",     [ 9] "fulham",     [10] "west ham",     [11] "southampton",     [12] "newcastle",     [13] "norwich",     [14] "sunderland",     [15] "stoke",     [16] "aston villa",     [17] "wigan",     [18] "qpr",     [19] "reading" ] 

it might bit easier visualize if @ first 2 entries in hsh using hsh[0,2]:

 [15] (pry) main: 0> hsh[0,2] [     [0] {              :statistics => "",                :position => "no movement 1",               :team_name => "man utd",                  :played => "33",                :home_won => "14",              :home_drawn => "0",               :home_lost => "2",                :home_for => "40",            :home_against => "17",                :away_won => "12",              :away_drawn => "3",               :away_lost => "2",                :away_for => "35",            :away_against => "18",         :goal_difference => "40",                  :points => "81",           :last_10_games => "\n                                    win\nwin\nwin\nwin\nwin\nwin\nwin\nloss\nwin\ndraw",                  :status => "\n                    report of man utd's last match                "     },     [1] {              :statistics => "",                :position => "no movement 2",               :team_name => "man city",                  :played => "32",                :home_won => "12",              :home_drawn => "3",               :home_lost => "1",                :home_for => "36",            :home_against => "11",                :away_won => "8",              :away_drawn => "5",               :away_lost => "3",                :away_for => "22",            :away_against => "16",         :goal_difference => "31",                  :points => "68",           :last_10_games => "\n                                    win\ndraw\ndraw\nloss\nwin\nwin\nloss\nwin\nwin\nwin",                  :status => "\n                    report of man city's last match                "     } ] 

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i dont understand how got returned hash

you got array of hashes because:

  hash[keys.zip(team.search('td').map(&:text))] 

coerces array of key/value pairs hash. got array of key/value pairs because keys.zip(team.search('td').map(&:text)) interweaves keys , results of team.search('td').map(&:text).

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so save each team name model, can iterate through loop?

file.open('team_names.txt', 'w') |fo|   fo.puts hsh.map{ |a| a[:team_name] } end 

it might hsh.map{ |a| a[:team_name] }.map(&:to_s) needed, puts to_s on every element in returned array automatically, auto-converting symbols strings you.

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if want map out team_name , position, have create seperate calls, ie map on each value? cant map out multiple values in same call can i?

this create array of arrays:

ary_of_arys = hsh.map{ |a| [ a[:team_name], a[:position] ] } 

this join inner arrays each row, print out rows:

file.open('team_names.txt', 'w') |fo|   fo.puts hsh.map{ |a| [ a[:team_name], a[:position] ].join(', ') } end